//

// ASCellNode+Internal.h

// AsyncDisplayKit

//

// Created by Max Gu on 2/19/16.

//

// Copyright (c) 2014-present, Facebook, Inc. All rights reserved.

// This source code is licensed under the BSD-style license found in the

// LICENSE file in the root directory of this source tree. An additional grant

// of patent rights can be found in the PATENTS file in the same directory.

//

#import "ASCellNode.h"

@protocol ASCellNodeInteractionDelegate <NSObject>

/**

* Notifies the delegate that the specified cell node has done a relayout.

* The notification is done on main thread.

*

* This will not be called due to measurement passes before the node has loaded

* its view, even if triggered by -setNeedsLayout, as it is assumed these are

* not relevant to UIKit. Indeed, these calls can cause consistency issues.

*

* @param node A node informing the delegate about the relayout.

* @param sizeChanged `YES` if the node's `calculatedSize` changed during the relayout, `NO` otherwise.

*/

- (void)nodeDidRelayout:(ASCellNode *)node sizeChanged:(BOOL)sizeChanged;

/*

* Methods to be called whenever the selection or highlight state changes

* on ASCellNode. UIKit internally stores these values to update reusable cells.

*/

- (void)nodeSelectedStateDidChange:(ASCellNode *)node;

- (void)nodeHighlightedStateDidChange:(ASCellNode *)node;

@end

@interface ASCellNode ()

@property (nonatomic, weak) id <ASCellNodeInteractionDelegate> interactionDelegate;

/*

* Back-pointer to the containing scrollView instance, set only for visible cells. Used for Cell Visibility Event callbacks.

*/

@property (nonatomic, weak) UIScrollView *scrollView;

- (void)__setSelectedFromUIKit:(BOOL)selected;

- (void)__setHighlightedFromUIKit:(BOOL)highlighted;

@end